Intake Air Temp

Timebomb

Timebomb

Bootney Lee Fonsworth
Joined
Apr 17, 2007
Messages
2,069
I installed a handy dandy digital thermometer to measure intake air temps. Took it for a test drive and recorded a max reading of 453deg pre intercooler and 125deg post. Test run was from 60mph to 120mph ambient temp was 55deg. boost held at 70psi. Just wondering what to look for with intake temps ??


Thanks, Coop
 
Timebomb said:
I installed a handy dandy digital thermometer to measure intake air temps. Took it for a test drive and recorded a max reading of 453deg pre intercooler and 125deg post. Test run was from 60mph to 120mph ambient temp was 55deg. boost held at 70psi. Just wondering what to look for with intake temps ??


Thanks, Coop
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Lest see, man your going to task my memory: 40/3B was over 400 out of the 3B at 35 psi, total was 550 pre-intercooler and at the hat was about 200, this going through a stock intercooler, the PDR intercooler dropped that 55 degrees (it was the prototype) so now were down to reasonable range, then add water/meth! I remember making a run one time when it was in the 40's outside and at 80 psi the intake temp was 105, that dog was scootin' with a different attitude. I did allot of R&D way back in 03/04 but I still have that autometer setup on my 98' but it only registers the highest temp and has a recall.

Jim
 
I still have that autometer setup on my 98' but it only registers the highest temp and has a recall.
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Jim...
What Autometer set-up was this?......Andy
 
12vchevydually said:
what kind of temp sensor did u use?
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AR-1500%20S.jpg



Im gonna put the probe on the primary today sometime.
 
I thought thermocouples worked on the voltage differential between two probes. Can you just relocate the second probe to make the gage read the differential temperature? My professor insists there is a second probe in the gage somewhere reading ambient temps, but I haven't tried taking mine apart to look for it.
 
Jim...
I like the way he did that with the Stealth,its a great read,thanks!.
 
Ph4tty said:
I thought thermocouples worked on the voltage differential between two probes. Can you just relocate the second probe to make the gage read the differential temperature? My professor insists there is a second probe in the gage somewhere reading ambient temps, but I haven't tried taking mine apart to look for it.
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Not sure how it works but its 2 channel, so 2 probes and Ive placed one befor the intercooler at the charger outlet and one in the intake.
 
Gotcha. I'm just curious if a regular analog pyro gage can be made to read a temperature differential like your electronic box does if the sensor used for the reference voltage was relocated. I doubt its made to stand up to an engine environment, but its just something I was thinking about. Sorry for the hijack.
 
We've run exposed-junction Type K's for several years to measure temp changes from compressors, water/meth, CACs and/or ICs, nitrous, etc.

Pairs straddling each "part" give great I/O data, and their low hysteresis captures it more accurately.
 
Jim Fulmer said:
http://www.stealth316.com/2-autometer3373.htm

Like this one!

Jim
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It says it comes with the probes, but i looked it up and it doesn't clearly state if it does or not? Looks like this would be a pretty nice set up. i just wish Isspro would finish researching the intake air temp gauge in the performax line. They list it, but when you call to buy they won't sell it to ya. They say they cant make it read fast enough, and that it would be a waste or your money at this point.
 
The digital guage I use takes 10 samples per second, that seems instant enough for me...lol
 
Ph4tty said:
I thought thermocouples worked on the voltage differential between two probes. Can you just relocate the second probe to make the gage read the differential temperature? My professor insists there is a second probe in the gage somewhere reading ambient temps, but I haven't tried taking mine apart to look for it.
Click to expand...

Actually they measure the voltage, which is generated as a proportion of the temperature differential between the sensing end of the probe and the other end of the wires (typically at the gauge). An industry standard is to assume the "cold junction" is at 70°F, but more advanced gauges will have a temperature sensor in them and use temperature compensation (as your professor suggested). For precise laboratory work it used to be common to place the cold junction in a bath of ice water (which was assumed to be at exactly 32°F if both ice and water are present). ISSPRO's Performax and EV2 series of gauges both use temperature compensated pyrometers.

07dodge said:
It says it comes with the probes, but i looked it up and it doesn't clearly state if it does or not? Looks like this would be a pretty nice set up. i just wish Isspro would finish researching the intake air temp gauge in the performax line. They list it, but when you call to buy they won't sell it to ya. They say they cant make it read fast enough, and that it would be a waste or your money at this point.
Click to expand...

We've actually made some progress on this, at least on the EV2 line. I have the first prototype ready to install on my truck (probably this weekend) to see just how hot I'm getting my non-intercooled truck!

Regards,
Michael Pliska
 
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